CAJ | 학술논문

分别以Fe3 O4、β-FeOOH、和α-Fe2 O3作为前驱物，采用Stober水解法制备了氧化铁/氧化硅核壳结构，研究了前驱物种类和原料用量对二氧化硅包覆过程的影响。随着氨水和 T EOS用量的增加，包覆层厚度增加，包覆更加均匀。对样品进行了扫描电镜（SEM ）、透射电镜（T EM ）和红外光谱（IR）表征。实验结果表明，在三种类型的前驱物中，二氧化硅在β-FeOO H表面包覆最均匀，包覆效果最好。
분별이Fe3 O4、β-FeOOH、화α-Fe2 O3작위전구물，채용Stober수해법제비료양화철/양화규핵각결구，연구료전구물충류화원료용량대이양화규포복과정적영향。수착안수화 T EOS용량적증가，포복층후도증가，포복경가균균。대양품진행료소묘전경（SEM ）、투사전경（T EM ）화홍외광보（IR）표정。실험결과표명，재삼충류형적전구물중，이양화규재β-FeOO H표면포복최균균，포복효과최호。
Fe3 O4 ,β-FeOOH and α-Fe2 O3 were used as the precursor for the preparation of iron oxide/silica core-shell structures by Stober method .The effects of the precursors ,the concentra-tion of TEOS and ammonia on the coating process of silica were investigated .With the increasing ammonia and T EOS concentration ,the silica layer thickness increased and became uniform .T he samples were characterized by scanning electron microscopy (SEM ) ,transmission electron mi-croscopy (TEM ) ,and infrared spectrum (IR) .The results showed that β-FeOOH was better than the other two precursors because its OH led to the formation of uniform silica layer .